Timing Chain Kit Water Pump Fit 07-10 Ford Mercury 3.5L Lincoln Mazda 3.7L DOHCThe timing chain is located in the front of the motor and is attached to a set of gears and pulleys that power multiple mechanical components, including the crankshaft and camshaft. In order for your engine to fire, the timing chain must smoothly rotate around the gears without hesitation. Although the timing chain is made out of metal, it is subject to wear and tear and may break if not replaced as recommended by the factory. Since the timing chain